Air treatment system filter



FIG. 1 is a perspective view of the air treatment system filterembodying the new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left-side view thereof; and,

FIG. 7 is a right-side view thereof.

FIGS. 1-7 may show features of the air treatment system filter in brokenlines. The broken lines depict environment and do not form any part ofthe claimed design, the broken lines immediately adjacent the solid-lineportions of the design form the boundary of the design and form no partof the claimed design.

CLAIM The ornamental design for an air treatment system filter, as shownand described.